Threading-machine.



PATENTED AUGLM, 1906.

J. A. DORAN. THREADING MACHINE.

APPLICATION FILED 00T,2.1905.

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WxTNEssEs N0. 828,466. PATBNTED AUG. 14, 1906.

J. A. DORAN.

THREADING MACHINE.

APPLICATION FILED O0T.2.1905.

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WITNESSES. INVENTOF? wP/acmf/mws/n;

ATTORNEY.

. UN TED STATES PATENT OFFICE.

- JAMES A. FDORANJIOHF PROVIDENCE, RHODE' ISLAND.

' l TFHQRE'ADING-IVIACHINE.

v No. 828,466.

Specification of Letters Patent.

- Patented Aug. 14, 1906.

Application filed October 2, 1905. Serial No. 280,895- 1 To: all whom itmay concern e it known that I, JAMES A. Donalga citizen of the UnitedStates, residing atProvi dence, in the county of Providence and State ofRhode Island, have invented certainnew and useful Improvements inThreading-Machines, of which the following is a specification, referencebeing had therein to the accompanying drawings.

My invention relates to automatic threading-machines; and the noveltyresides in the peculiar construction and arrangement of parts, all asmore fully hereinafter described, and then particularly pointed out inthe appended claims, and as illustrated in the accompanying drawings,wherein- Figure 1 is a plan view of a machine embodying my invention,showing a portion of the base broken away and omitting certain of theparts; Fig. 2, a front elevation of the same; Fig. 3, a modified form ofmy invention, and Fig. 4 a side elevation of a threading tool or die.Fig. 5 is a detail in top plan.

Like reference-numerals indicate like parts throughout the views.

My machine comprises a base 1 upon which are standards 2, supportingguide-bar 3 upon which is mounted a rack 4. A connectm rod 5 joins therack with a crank-pin 6, adjustably mounted in a slot 5 in a crank 6,mounted upon the driving-shaft 7, supported in standards 8 and driven bya pulley 9 on the driving-shaft. The crank-pin is provided with a nut 6to hold the connectingrod in ad'u'sted position, whereby the throw ofthe rac 4 may be regulated.

Upon the base 1 is a frame 10, with an arched portion 11, in which isadjustably mounted, by means of a binding-screw 12, a shank or block 13,carrying 11 on its lower end a screw 14, which loose y engages athreaded recess 15 in the upper end of a vertical bar or holder 16. Thebar 16 slides in the frame 10 and has its lower extremity re cessed-toreceive the shank of the tap, die, or

other; threading-tool 17, which is retained therein by means of abindingscrew. 1:8. A toothed wheel 16 is slidably keyed n the shaft 16intermediate its len th an engages the teeth of the rack 4, an amultiplyinggearing is interposed between said toothed wheel and thespindle. The threads upon screw 14 and the threading-tool are of thesame pitch.

A convenient form of. eeding mechanism is employed as follows: Abevel-gear 19Iupon the driving-shaft 7 meshes with a gear 20 uponthe-upper end of a shaft 21, mounted in a boss 21 on the base of themachine. A bevel-gear 22 upon the lower end of shaft 21 engages a gear23 upon one end of a shaft 24, mounted in brackets 25 below the base 1.Upon the opposite end of shaft 24 is a bevelgear 26, which meshes with abevel-gear 27, attached to the lower .face of a mutilated gear 28, Whoseteethf29 engage a full gear 30, mounted upon a shaft '31, whichtraverses the machine-base 1. Fixed to the upper end of shaft 31 is afeeding-disk 32, provided at intervals along the margin of its upperface with seats 33 to'receive the articles 34 intended to be fed to thethreading-tool 17.

The operation of my machine is as follows: Power is applied to the shaft7 through pulley 9 and transmitted, through crank 6 and connecting-rod5,to the rack 4, which in its reci rocation rotates, through the toothed.

w eel 16", the bar 16, thereby forcing the threading-tool 17 intoengagement with the article to be operated upon. The operation of thefeeding mechanism is as follows: The drivin shaft 7 drives the mutilatedgear 2.8 throug gear connections 19, 20, 22, 23, 26, and 27. The teeth29 upon this gear engaging the gear inter'mittentl advance the disk 32 aquarter-turn, where y the articles 34 are successively presented to theaction of the threading-tool 17. During the intervals of rotation of thedisk 32 and while the threading-tool is operating the articles aresuccessively removed from and inserted in the seats 33.

It is obvious that e uivalent results may be obtained by the mo ified'form of my machine shown in Fig. 3, wherein the threadingtool 17 has anextended shank provided with threads 17 and fixed at its upper end by ascrew 18 to the bar 16, which may be reciprocated, as hereinbeforedescribed. The threaded shank 17 engages a bushing 10 in the frame 10.This bushing is removable to permit the substitution of bushings adaptedto various sizes of threading-tools.

It will be noted that the binding-screw 12 permits the verticaladjustment of the theading-tool in relation to the article operatedupon, also that by adjustment of crank-pin 6- the extent of verticaltravel of the threading-tool is regulated.

In Fi 4 is shown the form of tool or die 17 em oyed in exteriorthreading, while the tap:17 isfiemployed in interior cutting.

I make no claim to the multiplying-gearing between the rack and thespindle.

Having described my invention, What I claim is- 1. In athreading-machine, the combination with a frame, of avertically-disposed bar mounted therein, a threading-tool mounted in thelower end of said bar, a vertically-disposed screw mounted in the frameabove said bar and loosely engaged in a recess in the upper end thereof,arack, means for actuating said rack and a gear slidably keyed upon saidbar and connected with said rack for rotating the bar, and awork-holder.

' 2. In a threading-machine, the combinationiof a frame, asupporting-bar mounted thereon, and a rack movable on said bar, of aframe with arched portion rising from said frame, a block adjustablymounted in the arched-frame, a screw carried by the lower end of saidblock, a vertically-disposed bar having a recess loosely receiving thelower end of said screw, and slidingly mounted in said arched frame, athreading-tool carried by the lower end of said bar, means slidablykeyed upon said bar and connected with said rack for rotating said bar,and a workholder.

3. In a threading-machine, the combination of a frame, a base, athreading-tool mounted above said base, a driving-shaft and connectionsabove said base for actuating said threading-tool, a feeding-disk abovesaid base, and means beneath said base for actuating said disk, andconnections between said means and said driving-shaft, as and for the.purpose specified.

In testimony whereof I have affixed my signature in presence of twowitnesses.

JAMES A. DORAN.

Witnesses:

HORATIO E. BELLOWS, JOSEPH A. BENOIT.

